Double-twist spindle



Nov. 2, 1954 O. BCCHMANN DOUBLE-TWIST SPINDLE Filed Aug. 14, 1951 u 7 I, ll 1 lll 130C HMANN OTTO v United States Patent O DOUBLE-TWIST SPINDLE Otto filochmann, Remscheid-Lennep, Germany Application August 14, 1951, SerialNo. 241,850 Claims priority, application Germany August 19, 1950.

15 Claims. (Cl. 5758.83)

The present invention relates to double-twist spindles and more particularly to a means for decreasing the wear of threads to be twisted as they pass through the double twist spindle.

One of the objects of the present invention is to construct' a double twist spmdie in such a way that it produces a minimum of wear and damage on the threads to be twisted as they pass through the double-twist spindle.

Another object of the present invention is to provide a double-twist spindle of the above type which consists of very few and simple parts for reducing the wear of the thread to be twisted.

A further object of the present invention is to provide a double-twist spindle of the above type in which the parts may be very easily assembled, disassembled and exchanged as required.

With the above objects in view, the present invention mainly consists of a double twist spindle having a pair of spindle core members which are spaced from each other and supported in a slotted tubular member. One of the core members is bored along its axis, and the other of the core members. is formed with a cutout aligned with a slot of the tubular supporting member. Between the two spindle core members and within the tubular support member there is mounted a ringshaped guide member provided with a central aperture aligned with the bore of the one spindle core member and overlapping the cut-out of the other spindle core member, so that the thread to be twisted may pass through the bore of the one spindle core member, through the aperture of the ring-shaped guide member, through the cut-out of the other spindle core member and out through the slot in the tubular support member. This ring-shaped core member is made of a hard material such as steel, which may be chrome plated, ceramics, or porcelain, and the aperture of the ringshaped core member is curved and provided with a smooth surface so as to produce a minimum of wear on the thread passing therethrough.- The ring-shaped guide member is preferably of a lesser thickness than the space between, the two spindle core members.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages there: of, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing, in which Fig. l is a partial sectional, view of one possible construction for carrying out the present invention; Fig. 2 is an end view of a lower spindle core member and shows the top end face thereof; and Fig. 3 is a fragmentary sectional view taken along line 3-3 of Fig. 2 in the direction of the arrows.

Referring to the drawing, there is showna spindle'core member 1 which is bored along its axis at 5 and a spindle core member 2 which is provided with two or more sector-shaped cutouts 2a in the end portion thereof located adjacent. to the spindle core member 1, as is indicated by the dotted lines in the upper portion of the spindle core member 2, as viewed in Fig. 1 of the drawing as is clearly shown in Figs. 2 and 3. The spindle core members 1 and 2 are slightly spaced from each other and fixedly mounted in tubular member 3 so as to be supported thereby. The tubular. member 3. is provided with two or'more slots 7 which are aligned with the cutouts 2a in the upper end poruon or the spindle core member 2. Located between the spindle core members 1 and 2 is the ring-shaped member 6v which may be made of steel, which may be. chrome plated, or of a ceramic material. or of porcelain. This ring-shaped member 6 has a central aperture aligned with the bore 5 and overlapping the cutouts 2a or the spindle. core member 2. of the aperture of the ring-shaped member 6 which is adjacent to core member 1 is smaller than the. end thereof which is located adjacent to the core member 2, and that this aperture is smoothly curved between the ends thereof. 'The ring-shapedv core. member 6v is provided with a hard, smooth surface at least at. the aperture thereof and is of a slightly smaller thickness than the space between the core members I. and 2 so.

that, when the parts of the device are disassembled to exchange one member 6 for another member 6;, slight diiferences in the thicknesses of these ring shaped members will not create any difiiculties.

The tubular support member 3 is mounted on the. member 8 which has two or more cut away portions 8a aligned with the slots located between parts 8b and 8c of member 8,. Mounted above the member 8 is the dish-shaped member 9 which has a hollow central projection in which the ball bearing 11 and the roller bearing 10 are mounted, as shown in the drawing. These bearings interconnect the dish-shaped member 9 with the spindle core member I, and the ball bearing 11 is tubular support member 3.

The operation of the structure illustrated in the drawing is believed to be evident. The dish-shaped member 9 is intended to remain substantially stationary and, to support the spool of thread to be twisted on the central projection thereof, while the parts 1, 2 6, and 8 all to,- tate together. The thread 4, from a spool (not shown) mounted on the central projection of dish-shaped member 9, passes through the bore 5 of spindle core membet I, through the central aperture of ring-shaped member 6, through a cutout 2a of spindle core member 2, through a slot 7 of tubular member 3, and through one of the cut away portions 8a of the member 8. This latter path for the thread to be twisted forms a conduit means for the thread, and the smoothly curved aperture of ring-shaped member 6 provides a smooth surface at the sharp bend in the conduit means so that a minimum of wear is caused on the thread to be twisted. In other known devices of this type, the thread must pass over a relatively sharp corner' at the bend in the path through which. it moves, and this sharp corner causes damage and wear on the thread to be twisted. These latter defects and disadvantages are completely eliminated by the structure described above, and in particular by ring-shaped member 6.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of double twist spindles differing from the types described above.'

While the invention has been illustrated and described as embodied in double twist spindles provided with a device. for reducing to a minimum the wear on the thread to be twisted, it is not intended to be limited to the details shown, since various modifications, and structural changes may be made. without departing in any way from the spirit of the present invention.

Without further analysis, he foregoing will so fully reveal the gist, of the,v present invention that others can by applying. current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific. aspects of this invention and, therefore, such adaptations should and are intended to be comprehendedwithin the meaning and range of equivalence of the following cla ms.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a double twist spindle, in combination. a first elongated spindle core member, said first. spindle core member being bored along its axis; a. second. elongated it will be notedv that the. end.

7' of tubular member 3 andv mounted directly above the spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members.

2. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular sup port member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an opposite end located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members.

3. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an opposite end located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members and said ring member being made of hard steel.

4. in a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an opposite end located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members and said ring member being made of hard steel and being chrome plated at least at said aperture thereof.

5. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said 'second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an oppositeend located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a'thickness which is slightly smaller than the distance between said first'an'd second elongated spindle core members, said ring member being made of porcelain and having a smooth surface at least at said aperture thereof.

6. In a double twistspindle, inv combination, a first elongated spindle core member; said first spindle core member being bored along its. axis; a second elongated spindle core member mounted coaxially with. said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being-formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a-centrally apertured ring member mounted in said tubular member between said first and second elongated-spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided throughthe bore of said first elongatedspindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an opposite end located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members, said ring member being made of a ceramic material and having a smooth surface at least at said aperture thereof.

7. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a rotatably mounted tubular support member embracing said first and second spindle core members and supporting the same for rotation therewith, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member, said aperture of said ring member having one end located adjacent to said first elongated spindle core member and having an opposite end located adjacent to said second elongated spindle core member, said opposite end of said aperture being of a larger diameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof, said ring member having a thickness which is slightly smaller than the distance between said first and second elongated spindle core members.

8. In a double twist spindle, in combination, a first elongated spindle core member bored along its axis; a second elongated spindle core member coaxial with said first spindle core member, having an end portion located adjacent to and spaced from said first spindle core member, and being formed in said end portion with a cutout extending into said second core member for the end and side faces thereof adjacent said first core member; a centrally apertured ring member arranged between sa-idtfirst and secondspindle core members and having the aperture thereof aligned with the bore of said first spindle core member and overlapping the cutout of said second core member; and a tubular support member embracing and supporting said-first and second spindle core members and being formed with at least one slot passing through the wall thereof and located opposite said ring member in alignment with saidcutout so'that a thread may be guided said tubular supfirst spindle core member, having an end portion locatedadjacent to andspaced from said first spindle core member, and being formed in said end portion with a cutout extending into said second core member for theend and side faces thereof adjacent said first core member; a centrally apertured ring member arrangedbetween said firstand second spindle core members and having the aperture thereof aligned with the bore of said first spindle core member and overlapping the cutout of said second core member, said aperture being smoothly curved and gradually increasing. in diameter from the side of said ring member adjacent said first spindle core member to the side of said ring member adjacent said second spindle core member; and a tubular support member embracing and supporting said first and second spindle core members and being formed with at least one slot passing" through the wall thereof and located opposite said ring member in alignment with said cutout so that a thread may be guided through the bore of said first spindle core member, through said centrally apertured ring member, through said cutout, and through said slot of said tubular support member.

10. In a double twist spindle, in combination, a first elongated spindle core member bored along its axis; a second elongated spindle core member coaxial with said first spindle core member, having an end portion located adjacent to and spaced from said first spindle core member, and being formed in said end portion with a cutout extending into said second core member for the end and side faces thereof adjacent said first core member; a centrally apertured ring member arranged between said first and second spindle core members and having the aperture thereof aligned with the bore of said first spindle core member and overlapping the cutout of said second core member, said aperture being smoothly curved and gradually increasing in diameter from the side of said ring member adjacent said first spindle core member to the side of said ring member adjacent said second spindle core member, and said aperture having on the side of said ring member adjacent said first spindle core member a diameter smaller than the bore of the latter; and a tubular support member embracing and supporting said first and second spindle core members and being formed with at least one slot passing through the wall thereof and located opposite said ring member in alignment with said cutout so that a thread may be guided through the bore of said first spindle core member, through said centrally apertured ring member, through said cutout, and through said slot of said tubular support member and so that the thread will engage only said ring member upon changing its direction from movement through said bore of said first spindle core member to movement through said slot of said tubular support member.

11. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the Wall thereof and being aligned with said cutout of said second through elongated spinde core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be guided through the bore of said first elongated spindle core member, through said centrally apertured ring member, through said cutout in said second spindle core member, and through said slot in said tubular support member.

12. In a double twist spindle, in combination, a first elongated spindle core member, said first spindle core member being bored along its axis; a second elongated spindle core member mounted coaxially with said first elongated spindle core member and being spaced therefrom, said second elongated spindle core member having an end portion located adjacent to said first elongated spindle core member and being formed with at least one cutout extending into the same and opening onto the end surface of said end portion of said second elongated spindle core member; a tubular support member embracing said first and second spindle core members and supporting the same, said tubular support member being formed with at least one slot passing through the wall thereof and being aligned with said cutout of said second elongated spindle core member; and a centrally apertured ring member mounted in said tubular member between said first and second elongated spindle core members, the aperture of said ring member being aligned with the bore of said first elongated spindle core member and overlapping said cutout of said second elongated spindle core member so that a thread may be. guided through the bore-of said first elongated spindle.

said opposite end of said aperture being of a largerdiameter than said one end thereof and said aperture being smoothly curved from said one end to said opposite end thereof.

13. In a double twist spindle as defined in claim 10 and wherein said ring member. is formed from hard steel and has the aperture thereof chrome plated.

14. In a double twist spindle as defined in claim 10 and wherein said ring member is made of a ceramic material which is smooth at said aperture of said ring member.

15. In a double twist spindle as defined in claim 10 and wherein said ring member is made from porcelain which is smooth at said aperture of said ring member.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,025,460 Lenk Dec. 24, 1935- 2,l56,330 Bochmann May 2, 1939 2,467,258 Fane Apr. 12, 1949' 2,484,016

Cochran Oct. 12, 1949 

